The splintered state of historical studies is one of the factors, McCullough said, adding:

“History is often taught in categories — women’s history, African American history, environmental history — so that many of the students have no sense of chronology. They have no idea what followed what.”

That’s a fair point. History by interest group can be an invitation to incoherence.

McCullough also pointed out that textbooks on history tend to “so politically correct as to be comic. Very minor characters that are currently fashionable are given considerable space, whereas people of major consequence … are given very little space or none at all.”

What’s more, as McCullough noted, textbooks often are tedious, boring, and poorly written. Historians by and large “haven’t learned to write very well,” McCullough wrote.

Although McCullough didn’t mention this in the interview, learning history can be frustrating because history is prone to error, distortion, and myth.

History quite simply can be myth-encrusted — and unlearning the myths of history can be challenging, time-consuming, and often unrewarding.

A telling example is the undying tale about William Randolph Hearst’s purported vow in an exchange of telegrams with Frederic Remington to “furnish the war” with Spain at the end of the 19th century.

As I discuss in Getting It Wrong, among the many reasons for doubting that anecdote are Hearst’s denial and the absence of any supporting documentation. The Remington-Hearst telegrams have never surfaced.

The urge to simplify history also explains the tenacity of the so-called “Cronkite Moment” of 1968, when the CBS News anchorman’s assessment of the Vietnam War as a “stalemate” supposedly prompted President Lyndon Johnson to realize the folly of his war policy and not to seek reelection.

However, as I discuss in Getting It Wrong, Johnson did not see the program when it aired, and Cronkite until late in his life claimed his “stalemate” assessment had at best modest influence, that it was “another straw on the back of a crippled camel.”